A straightforward chemoenzymaticsynthesis of optically active trans-N,N-dialkylcyclopentane-1,2-diamines has been efficiently developed starting out from their analogous (±)-trans-2-(N,N-dialkylamino)cyclopentanols. The route involves the one-pot stereospecific transformation of the racemic amino alcohols into racemic diamines and a subsequent kinetic resolution by means of lipase-B from Candida
The invention provides compounds of Formula (I):
1
wherein R
1
-R
4
have any of the values defined in the specification that are CCR-3 receptor antagonists, pharmaceutical compositions containing them, methods for their use, and methods and intermediates useful for preparing them.